Locomotive-furnace



(No Model.)

A. BACKUS, J1.

LKOCOMOTIVB FURNAGE.

Patented Aug. 3,0, 1887.

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ABSALOM BACKUS, JR., OF DETROIT, MICHIGAN.

LOCOMOTIVLFURNACE.

SPECIFICATION forming part of Letters Patent No. 369,156, dated August 30, 1887.

Application filed June l1, 1887. Serial No.- 240,990. (No model.)

To all whom it may concern:

Be it known that l, AEsALoM BAcKUs, Jr., a citizen of the United States, residing at Detroit,'in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Locomotive-Furnaces; and I do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form apart of this specification.

This invention relates to the construction of the furnace of locomotive and marine boilers for generating steam and heating purposes.

The object of this invention is to provide a furnace that will fully, or nearly so, consume the gases, carbonio smoke, and volatile particles of combustion as a means of saving fuel, making a more rapid heating and steam-generating furnace, and to overcome the smoke nuisance.

The invention consists, mainly, in providing the ordinary fire-box with an arch offire-brick, and in locating below said arch and the'feeddoor opening an angular or arched air-feeding grate or passage, whereby a sufficient'supply of oxygen is admitted to the furnace below the arched wall, and in locating below the arch and within the fire-box a series of rocking clinker-breaking grates, with a dumping-grate at the forward end of the fire-box, all of which will be hereinafter fully set forth, and pointed ont particularly in the claims.

In the accompanying drawings, forming a part of this specification, Figure 1 is a vertical central section of a locomotiveboiler and fire-box containing my invention. The grates and mechanismv for operating them are in elevation. Fig. 2 is a horizontal section taken on the dotted line .fr x of Fig. 1. Fig. 3 is a rear end elevation showing feed-door open. Fig. 4 isan isometrical of the Ventilating or airfeeding grate.

As indicated in the drawings, B is the boiler; F, the dues; H, the fire boX or chamber; A, the ash-pan', f, the dampers to the ash-pan; D, the iioor ofthe cab, and D' the feed-door to the fire-box.

The forwardwall, K, of the fire-box slightly below the feeddoor opening O, and are supported on the vertical rods r, having a foot or step, V, at the upper end, on which the bars lie, as shown in Fig. 1. In said side bars are journaled, as shown at 6, a series of rocking or clinkerbreaking grates, 10. Each grate l0 has a depending arm, c, which is pivoted to the operating or angular rod m, having the vertical portion 2 and horizontal part 3, its rear end vbeing pivoted at a: to the vertical rod Z', which passes through the floor D of the cab, having a conical end, a, which is adapted to iill the head a of the detachable operating-lever L, which is shown in Fig. 1 as coupled to a like rod, Z. By placing the lever L onto the head a of the rod Z and rocking back and forward, the clinker-grates 10 will be caused to tilt, as shown by dotted lines of Fig. l. Said grates may be of any suitable form. They are shown in Fig. 2 with interlocking ngers 4, (a form of grate in common use.)

Mounted on the supporting-bars B B', at the rear of the series of rocking grates 10, is an anguiar Ventilating-grate, N, which is L-shaped in cross-section, having a horizontal face, R, and vertical face R', each face being provided with a series of longitudinal openings or airpassages, e, as clearly shown in Fig. 4.

The Ventilating-grate N crosses the fire-box at the rear end, its horizontal part R meeting the wall K of the tire-box just below the bottom of the feed-door opening O.' (See Figs. 1 and2.)

C is an arched wall having side walls, S, which are supported by the inclined bars B B. The side and arched walls are of a uniform length, and extend forward about half' way into the fire-box H, having the rear ends abutting against the rear wall, K, of the firebox. The under face of the arch C, at the feeddoor opening O, is located slightly below the top of said opening, and is cut away or sloped, as shown at Y. (See Figs. 1 and 3.) Theineline Y of the arch causes the air passing through the ventilator or draft n in the feeddoor D to be deiiected downward, thus conveying the products of combustion-such as air-.and gases-into the intense or incandescent heat under the forward end of the arch C, also affording sufficient room to properly admit the fuel through the feed-opening.

Between the front end of the fire-box and the series of grates l0 is a dumping-grate, J. Its ends are pivoted at 14 in the supportingbars B B', and has a depending arm, h, to

the end of which is pivoted an operating-rod, t, having its rear end pivoted to the lower end of the rod or bar Z', having the lever L mounted thereon, as shown in Fig. l. By tilting said lever, as shown in Fig. l, the dumping-grate J will swing down and backward, as shown by dotted lines in Fig. l, thereby discharging any refuse thereon into the ash-pan A.

n is a crossbar mounted on the bars B B, and projects slightly over the swinging edge of the grate .I whereby its upward movement is arrested. The grate .I is locked in position by swinging the button or angular dog d so as to engage with the upper end of the bar Z, as shown in Fig. 2, the dog being located on the fioor of the cab; or any other suitable means may be employed for locking the dumpinggrate.

The furnace is to be operated as follows: rlhe fuel is passed through the feed-door opening onto the clinkerbeariug grates l0 below the arch. No fuel or coal is to be placed on the ventilatinggrate N, but forward thereof. The feed-door D being then closed, the air passes freely upward from the ash-pan into the furnace below and at the rear end of the arch through the openings e in the horizontal and vertical faces of the ventilatinggrate N, as indicated by arrows in Fig. i, thereby supplying the ignited products with a sufficient amount of oxygen to aid combustion. The arch C is inclined, its forward end being the lower, whereby the flames are forced downward before escaping into the re-box at the front end of the arch, thus preventing the escape of the gases and smoke.

In burning coal, as it becomes heated it con- -geals or melts and has atendeney to form one mass. To separate it, the operator places the lever L on the upper end of the bar Z and rocks the lever to and fro, tilting the clinkerbars l0, thereby loosening the mass to enable the oxygen to mingle with the burning prof ducts to better aid combustion. The operator, before again charging the furnace, forces with a rod the burning products forward onto the grates 10 at the front of the fire-box and places the fuel in at the rear end of the furnace, as before stated. The elinkers and re fuse are forced forward onto the dumpinggrate J, and are discharged therefrom into the ash-pan A by attaching the lever Iito the upper end of the bar Z and tilting it, as before stated. Air may also be admitted into the fire-box through the register a in the feed door.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent., is-

l. In a furnace, and in combination, the fire-boX, the inclined frame, the arched and side walls supported thereon, the series of clinker-breaking grates, the dumping-grate,

the Ventilating-grate located in the rear end of the fire-box, and the feed-door opening through the fire-box below the arched wall, substantially as andfor the purposes specified.

2. In combination with the fire-box, the arched wall, the feed-door opening in said firebox below the arched wall, the inclined frame having `journaled therein the series of gratcs 10, the Ventilating-grate N, located at the rear end of the fire-box and below the feed-door opening, and the mechanism for tilting the grates 10, substantially as speeicd.

3. In a furnace, the combination of the firebox, the feed-door opening, the arched wall located in the rear end of the fire-box over the feed-door opening, the series of gratebars located below the arched wall, the Ventilatinggrate N, located below the feed-door opening atan elevation to lheseriesofgrate-barsl, and the dumping-grate located in the front end of the fire-box, as and for the purposes specified.

In testimony whereofI affix my signature in presence of two witnesses.

ABsALoM menus, JR.

Witnesses:

R. B. WHEELER, J. D. HINCKLY. 

